Abstract This work presents experimental results on the inhibition performance of low-dosage hydrate inhibitors (LDHIs). The studied LDHIs, namely terpolymers of N -vinylcaprolactam and alkylimidazolium bromide or benzyl ammonium chloride and hydroxyethyl methacrylate or acrylamide derivatives, were synthesized at the Mexican Petroleum Institute with the objective of producing high performance inhibitors with higher cloud points than that exhibited by the poly( N -vinylcaprolactam) homopolymer. Three experimental methods were used to evaluate the hydrate inhibition performance of the synthesized terpolymers: 1) the capacity to inhibit the formation of tetrahydrofuran (THF) hydrates (atmospheric pressure and −0.5 °C); 2) the capacity to inhibit the formation of natural gas hydrates under high pressure and low temperature conditions (∼6 MPa, ∼1 °C, a subcooling of 16 °C for the studied natural gas sample); and 3) the determination of the cloud point temperature of the terpolymers in aqueous systems with varying salinity (atmospheric pressure and temperatures ranging from 2 °C to 81 °C). The inhibition performance and the high solubility (in highly saline aqueous systems) of the synthesized terpolymers indicate that these compounds could be considered promising kinetic hydrate inhibitors or gas-well anti-agglomerants to prevent or delay the formation or agglomeration of clathrate hydrates during the production and transport of hydrocarbons.

中文翻译：

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通过耐盐 N-乙烯基内酰胺三元共聚物抑制结构 II 水合物的形成

摘要 这项工作展示了低剂量水合物抑制剂 (LDHI) 抑制性能的实验结果。研究的 LDHI，即 N-乙烯基己内酰胺和烷基咪唑溴化物或苄基氯化铵和甲基丙烯酸羟乙酯或丙烯酰胺衍生物的三元共聚物，是在墨西哥石油研究所合成的，目的是生产具有比聚（ N-乙烯基己内酰胺）均聚物。三种实验方法用于评估合成三元共聚物的水合物抑制性能：1）抑制四氢呋喃（THF）水合物形成的能力（大气压和-0.5°C）；2）在高压和低温条件下（~6 MPa，~1°C）抑制天然气水合物形成的能力，所研究的天然气样品过冷度为 16 °C）；3) 测定不同盐度（大气压和温度范围为 2°C 至 81°C）的水性体系中三元共聚物的浊点温度。合成的三元共聚物的抑制性能和高溶解度（在高盐水溶液中）表明这些化合物可以被认为是有前途的动力学水合物抑制剂或气井抗凝聚剂，以防止或延迟生产过程中包合物水合物的形成或凝聚。和碳氢化合物的运输。